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Reproductive biology of great cormorant (Phalacrocorax carbo sinensis) in the qinghai-tibet plateau
Zhang, Tong-Zuo; Li, Lai-Xing; Lian, Xin-Ming; Cai, Zhen-Yuan; Su, Jian-Ping
2007-06-01
发表期刊WATERBIRDS
卷号30期号:2页码:305-309
文章类型Article
摘要There have been no detailed studies on reproductive biology of the Great Cormorant (Phalacrocorax carbo sinensis) in Qinghai-Tibet Plateau. We conducted such investigations during the breeding seasons of 1999 and 2000 in Qinghai-Lake Bird Isle, China. Great Cormorants began to migrate to Qinghai-Lake for reproduction from the middle of March and left from early October at the end of reproduction. Nesting periods were from early April to mid June and took 50 days. Egg-laying occurred during the three weeks from the end of April to 20 May. Females typically laid an egg every 1-2 days until clutch completion. Mean clutch size in the study area over two years was 3.3 (SE +/- 0.13, N = 68, range 1-5) and most (66.18%) fell within the range 3-4 eggs. Length of eggs averaged 61.01 mm and breadth averaged 34.13 mm. Fresh egg weight averaged 57.34 g (SE +/- 0.36, range 46.0-73.7 g, N = 179). Hatching success was 48.7% and fledging success was 64.9% over two years. Decline of available fish resources in Qinghai-Lake might be one of main causes of lower reproductive success. The causes of chick loss were possibly high altitude, high winds and prolonged rain.; There have been no detailed studies on reproductive biology of the Great Cormorant (Phalacrocorax carbo sinensis) in Qinghai-Tibet Plateau. We conducted such investigations during the breeding seasons of 1999 and 2000 in Qinghai-Lake Bird Isle, China. Great Cormorants began to migrate to Qinghai-Lake for reproduction from the middle of March and left from early October at the end of reproduction. Nesting periods were from early April to mid June and took 50 days. Egg-laying occurred during the three weeks from the end of April to 20 May. Females typically laid an egg every 1-2 days until clutch completion. Mean clutch size in the study area over two years was 3.3 (SE +/- 0.13, N = 68, range 1-5) and most (66.18%) fell within the range 3-4 eggs. Length of eggs averaged 61.01 mm and breadth averaged 34.13 mm. Fresh egg weight averaged 57.34 g (SE +/- 0.36, range 46.0-73.7 g, N = 179). Hatching success was 48.7% and fledging success was 64.9% over two years. Decline of available fish resources in Qinghai-Lake might be one of main causes of lower reproductive success. The causes of chick loss were possibly high altitude, high winds and prolonged rain.
关键词Reproductive Success Phalacrocorax Carbo Sinensis Eggs Clutch Size
WOS标题词Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]PREDATION RISK
收录类别SCI
语种英语
WOS研究方向Zoology
WOS类目Ornithology
WOS记录号WOS:000248130200019
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/1259
专题中国科学院西北高原生物研究所
作者单位1.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Tong-Zuo,Li, Lai-Xing,Lian, Xin-Ming,et al. Reproductive biology of great cormorant (Phalacrocorax carbo sinensis) in the qinghai-tibet plateau[J]. WATERBIRDS,2007,30(2):305-309.
APA Zhang, Tong-Zuo,Li, Lai-Xing,Lian, Xin-Ming,Cai, Zhen-Yuan,&Su, Jian-Ping.(2007).Reproductive biology of great cormorant (Phalacrocorax carbo sinensis) in the qinghai-tibet plateau.WATERBIRDS,30(2),305-309.
MLA Zhang, Tong-Zuo,et al."Reproductive biology of great cormorant (Phalacrocorax carbo sinensis) in the qinghai-tibet plateau".WATERBIRDS 30.2(2007):305-309.
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